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3,4-Dimethyl-1H-pyrazole

Also known as: 3,4-Dimethylpyrazole, 4,5-dimethyl-1H-pyrazole, 3,4-Dimethyl-1H-pyrazol, DMP, 3(5),4-dimethylpyrazole

3,4-Dimethyl-1H-pyrazole (CAS 2820-37-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H8N2 and a molecular weight of 96.13040 g/mol. Key properties include a melting point of 44-46°C and a boiling point of 220.3°C. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed, H318 — Causes serious eye damage and H412 — Harmful to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
2820-37-3
Jingsj CID
J-1605617-6
Molecular Formula
C5H8N2
Molecular Weight
96.13040 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026
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Physicochemical Properties

Melting Point44-46°C
Boiling Point220.3°C
Exact Mass96.06870
PSA28.68000
LogP1.02650

GHS Safety & Compliance

Corrosion / IrritantSignal word: Danger
  • H302 — Harmful if swallowed
  • H318 — Causes serious eye damage
  • H412 — Harmful to aquatic life with long lasting effects

Frequently Asked Questions

What is the CAS number of 3,4-Dimethyl-1H-pyrazole?

The CAS number of 3,4-Dimethyl-1H-pyrazole is 2820-37-3.

What are the molecular formula and molecular weight of 3,4-Dimethyl-1H-pyrazole?

3,4-Dimethyl-1H-pyrazole has molecular formula C5H8N2 and molecular weight 96.13040 g/mol.

Is 3,4-Dimethyl-1H-pyrazole hazardous?

3,4-Dimethyl-1H-pyrazole has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H318 — Causes serious eye damage; H412 — Harmful to aquatic life with long lasting effects.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "3,4-Dimethyl-1H-pyrazole (CAS 2820-37-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1605617-6 (accessed 2026-11-06).

Data for reference only; verify product details with suppliers before purchase.